Quick, effective abs workout: jackknife sit-ups
Jackknife sit-ups are a challenging way to develop strength in your abdominal muscles. Lying flat on the floor with your legs and arms outstretched, and using your abdominal muscles to bring them together, can give you quite a workout. You will definitely feel your abs working in this exercise.
Remember to do your stretches and warm-ups before doing this exercise. Lie down flat on your exercise mat with your arms stretched above your head and on the ground. Your entire body must be in a straight line and your legs close together. Remember this as your starting position.
Exhale as you fold your body close with the use of your abdominal muscles. Keep your arms straight up and your legs outstretched as you do this. Bring them together simultaneously until your butt is the only part of your body in contact with the floor. Your arms and legs should be parallel to each other as if you were reaching for your toes. Your legs and torso should be forming a “V” at your end point. Hold this “V” position for a second while keeping the tension in your abdominals. Inhale as you slowly go back to the starting point, guarding your movement with your abs contracted.
Repeat with the number of recommended reps and sets. Increase the difficulty by using a set of weights or by holding a medicine ball. This exercise is not recommended for those who have neck and back problems.
Contributed by Derek Hernandez of UltimateFitnessGear.com, your top source for the Shaun T Insanity Workout routine. *getinsanity.com*
